direction finder造句

cathode ray direction finder

direction finder and radiobeacon

VHF and UHF direction finder

automatic direction finder (ADF) reversal

manual direction finder bearing indicator

Performance requirements for shipborne radio direction finder

I am calibrating radio direction finder or adjusting compasses.

a direction finder that gives a bearing by determining the direction of incoming radio signals.

Function test and calibration self-heterodyne curve for direction finder on sea trial.